If your work requires no reading, research, or client/co worker interface then you may not find it as useful... because that's what it's best suited for. But if you do a lot of reading, attend meetings, interface with others (clients/coworkers/team members/legal/etc), do presentations, read/research/review... then it is a tool that absolutely can make your workflow more efficient. And that is EXTREMELY valuable "work".
That is true.
I've been using mine for taking notes in meetings. Type them up in the Notes app and then send them to Evernote for organizing and synching to my PCs.
I'm trying to use it to read all the scholarly research articles I have to read as a professor in Goodreader. But I'm struggling with that. The screen's a bit small to read many of the in portrait, and half page at a time in landscape is a lot of scrolling and annoying when you have portrait full-page tables you can only see half of at a time etc. Lastly, I highlight and jot a lot of notes and that's clunky vs. just writing on a printout. So I'm not sure I'll stick with that vs. just printing the PDFs out like I always have in the past. Especially for teaching as it's too hard to flip around to find passages to reference during class etc. in Goodreader vs. a print out with the places marked with post it flags.
The other parts of my work I just can't do on it. A tablet's not going to have all the database and statistical analysis packages I use for my research. I should be able to do things like writing and powerpoint on it, but none of the MS Office compatible apps get good ratings from my colleagues with iPads. Apparnently iWorks, Docstogo etc. screw up too much formatting going back and forth from them and PC MS Office programs when you have complex documents (i.e. scholarly journal articles I'm writing) that are full of tables, figures, objects like equations form MathType in Word, etc.
So you're right, it just depends on the type of work you do. A lot of mine is just stuff that will never be doable on a tablet. Some can be if we get better MS Office apps down the road.
One other thing I really need to use it for wor--even if it had MS Office--is a USB port (or accessory with one) that allows me to get files like Powerpoints on and off the iPad.
For instance, if I want to go to a conference with ONLY the iPad I need:
1) An app fully compatible with MS Powerpoint that won't screw up any formatting going back and forth. Can't have the situation where I work on the slides there and then there all messed up when I load them into Powerpoint on the PC in the conference room.
2) A way to get the slides off my iPad and onto a usb thumb drive so I can load them on the conference computer. It's often not feasible to hook up the iPad to the projector as the cable's not easily accessible, or everyone else in the session is using a laptop already hooked up and thus your interrupting things to switch to the iPad when your turn to present comes etc.
These are all easy things for Apple to add--especially the USB. Just allow the camera kit or another accessory to read usb drives and build in options to send the files to various apps and to send files from the apps to a drive when connected. MS Office compatibility is trickier as MS isn't likely to put out an iOS version of Office. But maybe someone like Open Office will make a version that's more compatible than the current options.